#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h> 
#include <stdlib.h> 
#include <string.h> 
#include <math.h> 
#include <ctype.h> 
#include <time.h> 
#include <assert.h>

int main()
{
	int a = 5;
	int b = 6;
	printf("a=%d\nb=%d\n", a, b);
	a = a ^ b;
	b = a ^ b;
	a = a ^ b;
	printf("a=%d\nb=%d\n",a,b);
	return 0;
}